A boy whose videos were watched by millions of social media users has died of an autoimmune disease at the age of six.

Antwain Fowler's phrase "where we about to eat at" was a viral sensation, which hundreds of thousands of users watching his videos frequently.

His mother Chyna announced the sad news on his Instagram account on Sunday, November 21.

"The pain in my heart is like no other. Why God," she wrote. Her grieving caption read: "Never in a million years. My heart is out of my chest."

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Antwain was diagnosed with a disease called autoimmune enteropathy in July 2015, just after he turned one.

On a GoFundMe page set up for him called Fighting with Antwain, his mother described his struggle with the disease.

"AIE is a rare immune deficiency disorder that attacks your intestines," the page reads. "Antwain has been hospitalized a countless number of times due to his poor health condition."

His mother goes on to describe how Antwain has undergone over 25 surgeries and was unable to drink milk or eat solid foods during his early childhood.

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Despite his constant battle with the condition, Antwain conveyed his joy for life in a hilarious video that his mother posted.

In the clip, Antwain sits in the back of a car and asks "Where we about to eat at?". The video went viral and turned Antwain into a social media sensation with over half a million followers on Instagram.

Since then, Antwain's mother has continued to share videos of her son that capture his cheeky character. Just five days ago she posted a video of him dancing in shoulder pads.

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However, despite a recent intravenous immune globulin procedure that doctors hoped would help Antwain gain muscle, his mother announced on Sunday that he had tragically passed away.

There has been an outpouring of support on social media from fans and followers who found inspiration in Antwain's love of life.

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"Heartbroken for you all. An Angel on earth. Sending so much love and prayer your way!" one person commented.

"Little man bought laughs and smiles to many people and will definitely be missed," wrote another., before a third added: "The kid was a blessing and angel."

Featured Image Credit: Geoff Smith / Alamy

Viral social media star known for his 'where we about to eat at' videos has died aged 6